#ifndef __M_DB_H__
#define __M_DB_H__
#include "util.hpp"
#include <mutex>
#include <cassert>

class user_table
{
private:
    MYSQL *_mysql;//mysql操作句柄
    std::mutex _mutex;//互斥锁保护数据库的访问操作
public:
    user_table(const std::string &host,
                                const std::string &username,
                                const std::string &password,
                                const std::string &dbname,
                                uint16_t port = 3306)
    {
        _mysql = mysql_util::mysql_create(host,username,password,dbname,port);
        assert(_mysql!=NULL);
    }
    //注册时新增用户
    bool insert(Json::Value &user)
    {
#define INSERT_USER "insert user values(null,'%s',password('%s'),1000,0,0);"
        //sprintf(void *buf,char *fomat,...)
        if(user["username"].isNull() || user["password"].isNull())
        {
            DLOG("INPUT PASSWORD OR USERNAME");
            return false;
        }
        char sql[4096] = {0};
        sprintf(sql,INSERT_USER,user["username"].asCString(),user["password"].asCString());
        bool ret = mysql_util::mysql_exec(_mysql,sql);
        if(ret == false)
        {
            DLOG("insert user info failed!!\n");
            return false;
        }
        return true;
    }
    //登陆验证，并且返回详细的用户信息  
    bool login(Json::Value &user)
    {
        //以用户名和密码作为查询过滤条件，查询到数据则表示用户名密码一致，否则用户名密码错误
#define LOGIN_USER "select id, score, total_count, win_count from user where username='%s' and password=password('%s');"
        if(user["username"].isNull() || user["password"].isNull())
        {
            DLOG("INPUT PASSWORD OR USERNAME");
            return false;
        }
        char sql[4096] = {0};
        MYSQL_RES *res = NULL;
        {
            std::unique_lock<std::mutex> lock(_mutex);
            sprintf(sql, LOGIN_USER, user["username"].asCString(), user["password"].asCString());
            bool ret = mysql_util::mysql_exec(_mysql, sql);
            if (ret == false)
            {
                DLOG("user login failed!!\n");
                return false;
            }
            res = mysql_store_result(_mysql);
            if (res == NULL)
            {
                DLOG("have no login user info!!");
                return false;
            }
        }
        int row_num = mysql_num_rows(res);
        if(row_num != 1)
        {
            DLOG("the user info queried is not unique!!");
            return false;
        }
        MYSQL_ROW row = mysql_fetch_row(res);
        user["id"] = (Json::UInt64)std::stol(row[0]);
        user["score"] = (Json::UInt64)std::stol(row[1]);
        user["total_count"] = std::stoi(row[2]);
        user["win_count"] = std::stoi(row[3]);
        mysql_free_result(res);
        return true;
    }
    //通过用户名获取用户信息
    bool select_by_name(const std::string &name,Json::Value &user)//通过用户名获取用户信息
    {
#define USER_BY_NAME "select id, score, total_count, win_count from user where username='%s';"
        char sql[4096] = {0};
        sprintf(sql,USER_BY_NAME,name.c_str());
        MYSQL_RES *res = NULL;
        {
            std::unique_lock<std::mutex> lock(_mutex);
            bool ret = mysql_util::mysql_exec(_mysql, sql);
            if (ret == false)
            {
                DLOG("get user by name failed!!\n");
                return false;
            }
            res = mysql_store_result(_mysql);
            if (res == NULL)
            {
                DLOG("have no user info!!");
                return false;
            }
            int row_num = mysql_num_rows(res);
            if (row_num != 1)
            {
                DLOG("the user info queried is not unique!!");
                return false;
            }
        }
        int row_num = mysql_num_rows(res);
        if(row_num != 1)
        {
            DLOG("the user info queried is not unique!!");
            return false;
        }
        MYSQL_ROW row = mysql_fetch_row(res);
        user["id"] = (Json::UInt64)std::stol(row[0]);
        user["username"] = name;
        user["score"] = (Json::UInt64)std::stol(row[1]);
        user["total_count"] = std::stoi(row[2]);
        user["win_count"] = std::stoi(row[3]);
        mysql_free_result(res);
        return true;
    }
    //通过id获取用户信息
    bool select_by_id(uint64_t id,Json::Value &user)
    {
#define USER_BY_ID "select username, score, total_count, win_count from user where id=%d;"
        char sql[4096] = {0};
        sprintf(sql,USER_BY_ID,id);
        MYSQL_RES *res = NULL;
        {
            std::unique_lock<std::mutex> lock(_mutex);
            bool ret = mysql_util::mysql_exec(_mysql, sql);
            if (ret == false)
            {
                DLOG("get user by id failed!!\n");
                return false;
            }
            res = mysql_store_result(_mysql);
            if (res == NULL)
            {
                DLOG("have no user info!!");
                return false;
            }
        }
        int row_num = mysql_num_rows(res);
        if(row_num != 1)
        {
            DLOG("the user info queried is not unique!!");
            return false;
        }
        MYSQL_ROW row = mysql_fetch_row(res);
        user["id"] = (Json::UInt64)id;
        user["username"] = row[0];
        user["score"] = (Json::UInt64)std::stol(row[1]);
        user["total_count"] = std::stoi(row[2]);
        user["win_count"] = std::stoi(row[3]);
        mysql_free_result(res);
        return true;
    }
    //胜利时，天梯分数增加30，战斗场次增加1，胜利场次增加1
    bool win(uint64_t id)
    {
#define USER_WIN "update user set score=score+30, total_count=total_count+1, win_count=win_count+1 where id=%d;"
        char sql[4096] = {0};
        sprintf(sql,USER_WIN,id);
        bool ret = mysql_util::mysql_exec(_mysql,sql);
        if(ret == false)
        {
            DLOG("update win user info failed!!\n");
            return false;
        }
        return true;
    }
    //失败时，天梯分数减少30，战斗场次增加1，其余不变
    bool lose(uint64_t id)
    {
#define USER_LOSE "update user set score=score-30, total_count=total_count+1 where id=%d;"
        char sql[4096] = {0};
        sprintf(sql,USER_LOSE,id);
        bool ret = mysql_util::mysql_exec(_mysql,sql);
        if(ret == false)
        {
            DLOG("update lose user info failed!!\n");
            return false;
        }
        return true;
    }


    ~user_table()
    {
        mysql_util::mysql_destroy(_mysql);
        _mysql=NULL;
    }
};

#endif